package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /*
    新增套餐
     */
    @Transactional
    @Override
    public void save(SetmealDTO setmealDTO) {
        //先增套餐
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.save(setmeal);

        Long SetmealId=setmeal.getId();
        //再增套餐中的菜品
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(SetmealId);
        });
        setmealDishMapper.save(setmealDishes);
    }
    /*
    分页查询
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());

        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }
    /*
    根据id查询套餐
    */
    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes=setmealDishMapper.getSetmealById(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    /*
      批量删除
             */
    @Transactional
    @Override
    public void delete(List<Long> ids) {//是否可以删除？
        //起售中，不可删除,需要根据id查询状态
        ids.forEach(id ->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus()==1){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

            //批量删除套餐数据
            setmealMapper.deleteByIds(ids);
            //批量删除菜品数据
            setmealDishMapper.deleteByIds(ids);

        //delete from dish where id in(1,2,3)
    }
    /*
    修改套餐
     */
    @Transactional
    @Override
    public void update(SetmealDTO setmealDTO) {
        //修改setmeal 和setmealdishs
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        Long setmealid =setmeal.getId();
        //先删除
        setmealDishMapper.deleteById(setmealid);
        //再添加
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealid);
        });
        setmealDishMapper.save(setmealDishes);
    }
    /*
    起售停售
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Setmeal setmeal = Setmeal.builder().status(status).id(id).build();
        setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}

